5.2 Common observation
Heat pump
cannot
be started
Water pump is
running with
high noise or
without water
Heat pump
capacity is low,
compressor
do not stop
High compressor
exhaust
Low pressure
problem
of the system
Compressor
do not run
High noise of
compressor
Fan do not run
The compressor
runs but heat
pump has not
heating or
cooling capacity
Low outlet water
temperature
Low water flow
protection
Look over and clea r the failure according to below information.
5.Maintenance and Inspection
11
5.Maintenance and Inspection
5.1 Ordinary Malfunctions And Solution
malfunction
display
Water inlet temp.
Sensor failure
Evaporator sen sor
failure
Anti freezing
under cooling mo de
E1
E2
E3
tC1
Reason
The sensor is open
or short circuit
Check or change th e sensor
resolution
Water flow rate
is not enough
Water outlet temp.
Sensor failure
The sensor is open
or short circuit
Check or change th e sensor
The sensor is open
or short circuit
Check or change th e sensor
Check the water flow volume,
or water system is jammed or not
High pressure
protect
Check through ea ch pressure switch
and return circu it
High pressure
switch action
Normal working
Flow switch failure
No water/little water
in water system.
Check the water flow volume,
water pump is fail ure or not
Low pressure
protect
Low pressure
switch action
Check through ea ch pressure switch
and return circu it
Exhaust temperature/
or current protect
HP1
LP1
FL
A1
Exhaust temperature
or current is too high
Check through ex haust temp. switch
and current
Ambient sensor
failure
E4
The sensor is open
or short circuit
Check or change th e sensor
4.3.Parameters Table
Code
Meaning
Default value
Unit
R01
27
℃
Cooling temper ature
Cooling temper ature difference
Heating temper ature
Heating temper ature difference
R02
R03
R04
2
27
2
℃
℃
℃
4.2.4 Malfunction
When there is something wrong with the unit, the wire controller will display the error code
according to the fault reason.
For the detailed meanings of the error codes please refer to the Fault Table.
For example:
Water inlet fault
CAR EDL
μ
C DIN
2
Prg
mut e
Sel
cle ar